Bug 144 is a pathological case where right-recursion is used in a parallel
conjunction and the conjuncts cannot be re-ordered. This can cause excess
stack allocation and abysmal performance. The --max-contexts-per-thread
runtime option is used to reduce the impact of these cases by reducing the
amount of parallelism gained at runtime.
Bug 171 is a simple case where the threadscope grade could not be compiled
without enabling the Boehm garbage collector.
runtime/mercury_threadscope.c:
Enclose boehm GC specific code within #ifdef MR_BOEHM_GC
runtime/mercury_context.[ch]:
Record the number of contexts running or suspended at any time in a new
variable, MR_num_outstanding_contexts
Remove counts of other in-use objects such as the sum of outstanding
contexts and sparks.
Remove two granularity control macros that haven't been used for some time.
compiler/granularity.m:
Ensure that the runtime granularity decision is updated for when it is
available.
library/par_builtin.m:
Remove granularity decisions for which support has been removed in the
runtime.
tests/par_conj/Mmakefile:
tests/par_conj/pathological_right_recursion.{m,exp}:
Add a test case for bug 144.
